Device employing vibration for transporting plastic substances with a high coefficient of friction

Abstract

In a device for transporting in the plastic state substances with a high coefficient of friction via a pipe (10) in which the substances and the pipe (10) are caused to vibrate relative to one another by one or more vibration generators, the vibrations are transmitted to the above-mentioned pipe (10). Each of the generators (5) can transmit the vibrations to a fluid contained in chambers (7) that are arranged coaxially with and outside of the pipe (10), with the fluid being in contact with the pipe itself.

We claim: 
     
       1. Device for transporting in the plastic state substances with a high coefficient of sliding and/or internal friction along a conveyor pipe wherein at least one vibration generator is used to cause the substances and the pipe to vibrate relative to one another, wherein each said at least one vibration generator extends into a fluid-containing chamber surrounding the pipe and contacts a fluid contained in said chamber, said fluid in turn being in contact with the pipe. 
     
     
       2. Device according to claim 1, in which said chamber is annular and is arranged coaxially outside said pipe. 
     
     
       3. Device according to claim 1, in which the vibration generator is a generator-converter equipped with a sonotrode located inside said chamber. 
     
     
       4. Device according to claim 1, in which said fluid is kept at a preset temperature and transfers its heat to said pipe. 
     
     
       5. Device according to claim 4, further comprising a mold (9, 29) disposed at an outlet of the pipe, and a second vibration generator contacting the mold. 
     
     
       6. Device according to claim 1, in which the fluid is mercury. 
     
     
       7. Device according to claim 1, in which said vibrations are transmitted to the pipe by piezoelectric devices that are brought into contact with the pipe.